Commit | Line | Data |
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785b93ef DA |
1 | /* |
2 | * Copyright (c) 2006-2009 Red Hat Inc. | |
3 | * Copyright (c) 2006-2008 Intel Corporation | |
4 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
5 | * | |
6 | * DRM framebuffer helper functions | |
7 | * | |
8 | * Permission to use, copy, modify, distribute, and sell this software and its | |
9 | * documentation for any purpose is hereby granted without fee, provided that | |
10 | * the above copyright notice appear in all copies and that both that copyright | |
11 | * notice and this permission notice appear in supporting documentation, and | |
12 | * that the name of the copyright holders not be used in advertising or | |
13 | * publicity pertaining to distribution of the software without specific, | |
14 | * written prior permission. The copyright holders make no representations | |
15 | * about the suitability of this software for any purpose. It is provided "as | |
16 | * is" without express or implied warranty. | |
17 | * | |
18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
24 | * OF THIS SOFTWARE. | |
25 | * | |
26 | * Authors: | |
27 | * Dave Airlie <airlied@linux.ie> | |
28 | * Jesse Barnes <jesse.barnes@intel.com> | |
29 | */ | |
d56b1b9d SK |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
3b40a443 | 32 | #include <linux/kernel.h> |
785b93ef | 33 | #include <linux/sysrq.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
785b93ef | 35 | #include <linux/fb.h> |
e0cd3608 | 36 | #include <linux/module.h> |
760285e7 DH |
37 | #include <drm/drmP.h> |
38 | #include <drm/drm_crtc.h> | |
39 | #include <drm/drm_fb_helper.h> | |
40 | #include <drm/drm_crtc_helper.h> | |
bbb1e524 RC |
41 | #include <drm/drm_atomic.h> |
42 | #include <drm/drm_atomic_helper.h> | |
785b93ef | 43 | |
f64c5573 DV |
44 | static bool drm_fbdev_emulation = true; |
45 | module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); | |
46 | MODULE_PARM_DESC(fbdev_emulation, | |
47 | "Enable legacy fbdev emulation [default=true]"); | |
48 | ||
785b93ef DA |
49 | static LIST_HEAD(kernel_fb_helper_list); |
50 | ||
d0ddc033 DV |
51 | /** |
52 | * DOC: fbdev helpers | |
53 | * | |
54 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 55 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
56 | * helper functions used by many drivers to implement the kernel mode setting |
57 | * interfaces. | |
207fd329 | 58 | * |
10a23102 TR |
59 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
60 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
61 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
62 | * default behaviour can override the third step with their own code. | |
63 | * Teardown is done with drm_fb_helper_fini(). | |
207fd329 DV |
64 | * |
65 | * At runtime drivers should restore the fbdev console by calling | |
3d9e35a9 GU |
66 | * drm_fb_helper_restore_fbdev_mode_unlocked() from their ->lastclose callback. |
67 | * They should also notify the fb helper code from updates to the output | |
207fd329 DV |
68 | * configuration by calling drm_fb_helper_hotplug_event(). For easier |
69 | * integration with the output polling code in drm_crtc_helper.c the modeset | |
83c617c5 | 70 | * code provides a ->output_poll_changed callback. |
207fd329 DV |
71 | * |
72 | * All other functions exported by the fb helper library can be used to | |
73 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
74 | * |
75 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
76 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
77 | * helper must be called first to initialize the minimum required to make | |
78 | * hotplug detection work. Drivers also need to make sure to properly set up | |
79 | * the dev->mode_config.funcs member. After calling drm_kms_helper_poll_init() | |
80 | * it is safe to enable interrupts and start processing hotplug events. At the | |
81 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
82 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
83 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
84 | * and set up an initial configuration using the detected hardware, drivers | |
85 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
86 | * drm_fb_helper_initial_config(). | |
eaa434de | 87 | * |
2dad551c NT |
88 | * If &drm_framebuffer_funcs ->dirty is set, the |
89 | * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will | |
90 | * accumulate changes and schedule &drm_fb_helper ->dirty_work to run right | |
91 | * away. This worker then calls the dirty() function ensuring that it will | |
92 | * always run in process context since the fb_*() function could be running in | |
93 | * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io | |
94 | * callback it will also schedule dirty_work with the damage collected from the | |
95 | * mmap page writes. | |
d0ddc033 DV |
96 | */ |
97 | ||
207fd329 DV |
98 | /** |
99 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
100 | * emulation helper | |
101 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
102 | * | |
103 | * This functions adds all the available connectors for use with the given | |
104 | * fb_helper. This is a separate step to allow drivers to freely assign | |
105 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
106 | * not adequate to be used for the fbcon. | |
107 | * | |
169faeca DV |
108 | * This function is protected against concurrent connector hotadds/removals |
109 | * using drm_fb_helper_add_one_connector() and | |
110 | * drm_fb_helper_remove_one_connector(). | |
207fd329 | 111 | */ |
0b4c0f3f | 112 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 113 | { |
0b4c0f3f DA |
114 | struct drm_device *dev = fb_helper->dev; |
115 | struct drm_connector *connector; | |
15fce29d | 116 | int i, ret; |
d50ba256 | 117 | |
f64c5573 DV |
118 | if (!drm_fbdev_emulation) |
119 | return 0; | |
120 | ||
169faeca | 121 | mutex_lock(&dev->mode_config.mutex); |
6295d607 | 122 | drm_for_each_connector(connector, dev) { |
15fce29d | 123 | ret = drm_fb_helper_add_one_connector(fb_helper, connector); |
0b4c0f3f | 124 | |
15fce29d | 125 | if (ret) |
0b4c0f3f | 126 | goto fail; |
0b4c0f3f | 127 | } |
169faeca | 128 | mutex_unlock(&dev->mode_config.mutex); |
d50ba256 | 129 | return 0; |
0b4c0f3f DA |
130 | fail: |
131 | for (i = 0; i < fb_helper->connector_count; i++) { | |
132 | kfree(fb_helper->connector_info[i]); | |
133 | fb_helper->connector_info[i] = NULL; | |
134 | } | |
135 | fb_helper->connector_count = 0; | |
169faeca DV |
136 | mutex_unlock(&dev->mode_config.mutex); |
137 | ||
15fce29d | 138 | return ret; |
d50ba256 | 139 | } |
0b4c0f3f | 140 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 141 | |
65c2a89c DA |
142 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
143 | { | |
144 | struct drm_fb_helper_connector **temp; | |
145 | struct drm_fb_helper_connector *fb_helper_connector; | |
146 | ||
f64c5573 DV |
147 | if (!drm_fbdev_emulation) |
148 | return 0; | |
149 | ||
65c2a89c DA |
150 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
151 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { | |
14f476fa | 152 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
65c2a89c DA |
153 | if (!temp) |
154 | return -ENOMEM; | |
155 | ||
156 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; | |
157 | fb_helper->connector_info = temp; | |
158 | } | |
159 | ||
160 | ||
161 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
162 | if (!fb_helper_connector) | |
163 | return -ENOMEM; | |
164 | ||
6e86d58b | 165 | drm_connector_reference(connector); |
65c2a89c DA |
166 | fb_helper_connector->connector = connector; |
167 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
168 | return 0; | |
169 | } | |
170 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
171 | ||
172 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, | |
173 | struct drm_connector *connector) | |
174 | { | |
175 | struct drm_fb_helper_connector *fb_helper_connector; | |
176 | int i, j; | |
177 | ||
f64c5573 DV |
178 | if (!drm_fbdev_emulation) |
179 | return 0; | |
180 | ||
65c2a89c DA |
181 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
182 | ||
183 | for (i = 0; i < fb_helper->connector_count; i++) { | |
184 | if (fb_helper->connector_info[i]->connector == connector) | |
185 | break; | |
186 | } | |
187 | ||
188 | if (i == fb_helper->connector_count) | |
189 | return -EINVAL; | |
190 | fb_helper_connector = fb_helper->connector_info[i]; | |
6e86d58b | 191 | drm_connector_unreference(fb_helper_connector->connector); |
65c2a89c DA |
192 | |
193 | for (j = i + 1; j < fb_helper->connector_count; j++) { | |
194 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; | |
195 | } | |
196 | fb_helper->connector_count--; | |
197 | kfree(fb_helper_connector); | |
2148f18f | 198 | |
65c2a89c DA |
199 | return 0; |
200 | } | |
201 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
202 | ||
99231028 JW |
203 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
204 | { | |
205 | uint16_t *r_base, *g_base, *b_base; | |
206 | int i; | |
207 | ||
04c0c569 VS |
208 | if (helper->funcs->gamma_get == NULL) |
209 | return; | |
210 | ||
99231028 JW |
211 | r_base = crtc->gamma_store; |
212 | g_base = r_base + crtc->gamma_size; | |
213 | b_base = g_base + crtc->gamma_size; | |
214 | ||
215 | for (i = 0; i < crtc->gamma_size; i++) | |
216 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
217 | } | |
218 | ||
219 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
220 | { | |
221 | uint16_t *r_base, *g_base, *b_base; | |
222 | ||
ebe0f244 LP |
223 | if (crtc->funcs->gamma_set == NULL) |
224 | return; | |
225 | ||
99231028 JW |
226 | r_base = crtc->gamma_store; |
227 | g_base = r_base + crtc->gamma_size; | |
228 | b_base = g_base + crtc->gamma_size; | |
229 | ||
7ea77283 | 230 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); |
99231028 JW |
231 | } |
232 | ||
207fd329 DV |
233 | /** |
234 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
235 | * @info: fbdev registered by the helper | |
236 | */ | |
1a7aba7f JB |
237 | int drm_fb_helper_debug_enter(struct fb_info *info) |
238 | { | |
239 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 240 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
241 | int i; |
242 | ||
1a7aba7f JB |
243 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
244 | for (i = 0; i < helper->crtc_count; i++) { | |
245 | struct drm_mode_set *mode_set = | |
246 | &helper->crtc_info[i].mode_set; | |
247 | ||
248 | if (!mode_set->crtc->enabled) | |
249 | continue; | |
250 | ||
251 | funcs = mode_set->crtc->helper_private; | |
99231028 | 252 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
253 | funcs->mode_set_base_atomic(mode_set->crtc, |
254 | mode_set->fb, | |
255 | mode_set->x, | |
413d45d3 | 256 | mode_set->y, |
21c74a8e | 257 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
258 | } |
259 | } | |
260 | ||
261 | return 0; | |
262 | } | |
263 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
264 | ||
265 | /* Find the real fb for a given fb helper CRTC */ | |
266 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
267 | { | |
268 | struct drm_device *dev = crtc->dev; | |
269 | struct drm_crtc *c; | |
270 | ||
6295d607 | 271 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 272 | if (crtc->base.id == c->base.id) |
f4510a27 | 273 | return c->primary->fb; |
1a7aba7f JB |
274 | } |
275 | ||
276 | return NULL; | |
277 | } | |
278 | ||
207fd329 DV |
279 | /** |
280 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
281 | * @info: fbdev registered by the helper | |
282 | */ | |
1a7aba7f JB |
283 | int drm_fb_helper_debug_leave(struct fb_info *info) |
284 | { | |
285 | struct drm_fb_helper *helper = info->par; | |
286 | struct drm_crtc *crtc; | |
be26a66d | 287 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
288 | struct drm_framebuffer *fb; |
289 | int i; | |
290 | ||
291 | for (i = 0; i < helper->crtc_count; i++) { | |
292 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
293 | crtc = mode_set->crtc; | |
294 | funcs = crtc->helper_private; | |
295 | fb = drm_mode_config_fb(crtc); | |
296 | ||
297 | if (!crtc->enabled) | |
298 | continue; | |
299 | ||
300 | if (!fb) { | |
301 | DRM_ERROR("no fb to restore??\n"); | |
302 | continue; | |
303 | } | |
304 | ||
99231028 | 305 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 306 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 307 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
308 | } |
309 | ||
310 | return 0; | |
311 | } | |
312 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
313 | ||
bbb1e524 RC |
314 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
315 | { | |
316 | struct drm_device *dev = fb_helper->dev; | |
317 | struct drm_plane *plane; | |
318 | struct drm_atomic_state *state; | |
319 | int i, ret; | |
f72c6b33 | 320 | unsigned plane_mask; |
bbb1e524 RC |
321 | |
322 | state = drm_atomic_state_alloc(dev); | |
323 | if (!state) | |
324 | return -ENOMEM; | |
325 | ||
326 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
327 | retry: | |
f72c6b33 | 328 | plane_mask = 0; |
bbb1e524 RC |
329 | drm_for_each_plane(plane, dev) { |
330 | struct drm_plane_state *plane_state; | |
331 | ||
332 | plane_state = drm_atomic_get_plane_state(state, plane); | |
333 | if (IS_ERR(plane_state)) { | |
334 | ret = PTR_ERR(plane_state); | |
335 | goto fail; | |
336 | } | |
337 | ||
16e910df | 338 | plane_state->rotation = BIT(DRM_ROTATE_0); |
bbb1e524 | 339 | |
f72c6b33 ML |
340 | plane->old_fb = plane->fb; |
341 | plane_mask |= 1 << drm_plane_index(plane); | |
342 | ||
bbb1e524 RC |
343 | /* disable non-primary: */ |
344 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
345 | continue; | |
346 | ||
347 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
348 | if (ret != 0) | |
349 | goto fail; | |
350 | } | |
351 | ||
352 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
353 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
354 | ||
355 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
356 | if (ret != 0) | |
357 | goto fail; | |
358 | } | |
359 | ||
360 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
361 | |
362 | fail: | |
f72c6b33 | 363 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 364 | |
bbb1e524 RC |
365 | if (ret == -EDEADLK) |
366 | goto backoff; | |
367 | ||
94284037 MR |
368 | if (ret != 0) |
369 | drm_atomic_state_free(state); | |
bbb1e524 RC |
370 | |
371 | return ret; | |
372 | ||
373 | backoff: | |
374 | drm_atomic_state_clear(state); | |
375 | drm_atomic_legacy_backoff(state); | |
376 | ||
377 | goto retry; | |
378 | } | |
379 | ||
b7bdf0a8 | 380 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 381 | { |
3858bc5d VS |
382 | struct drm_device *dev = fb_helper->dev; |
383 | struct drm_plane *plane; | |
3858bc5d VS |
384 | int i; |
385 | ||
386 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 387 | |
d3a46183 | 388 | if (dev->mode_config.funcs->atomic_commit) |
bbb1e524 RC |
389 | return restore_fbdev_mode_atomic(fb_helper); |
390 | ||
6295d607 | 391 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
392 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
393 | drm_plane_force_disable(plane); | |
6aed8ec3 | 394 | |
9783de20 | 395 | if (dev->mode_config.rotation_property) { |
3a5f87c2 TW |
396 | drm_mode_plane_set_obj_prop(plane, |
397 | dev->mode_config.rotation_property, | |
398 | BIT(DRM_ROTATE_0)); | |
9783de20 SJ |
399 | } |
400 | } | |
401 | ||
e8e7a2b8 DA |
402 | for (i = 0; i < fb_helper->crtc_count; i++) { |
403 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
404 | struct drm_crtc *crtc = mode_set->crtc; |
405 | int ret; | |
406 | ||
03f9abb2 AD |
407 | if (crtc->funcs->cursor_set2) { |
408 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
409 | if (ret) | |
48f87dd1 | 410 | return ret; |
03f9abb2 | 411 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
412 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
413 | if (ret) | |
b7bdf0a8 | 414 | return ret; |
3858bc5d VS |
415 | } |
416 | ||
2d13b679 | 417 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 418 | if (ret) |
b7bdf0a8 | 419 | return ret; |
e8e7a2b8 | 420 | } |
b7bdf0a8 DV |
421 | |
422 | return 0; | |
e8e7a2b8 | 423 | } |
5ea1f752 RC |
424 | |
425 | /** | |
426 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
427 | * @fb_helper: fbcon to restore | |
428 | * | |
429 | * This should be called from driver's drm ->lastclose callback | |
430 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
431 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
432 | * |
433 | * RETURNS: | |
434 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 435 | */ |
b7bdf0a8 | 436 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
437 | { |
438 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
439 | bool do_delayed; |
440 | int ret; | |
e2809c7d | 441 | |
f64c5573 DV |
442 | if (!drm_fbdev_emulation) |
443 | return -ENODEV; | |
444 | ||
5ea1f752 RC |
445 | drm_modeset_lock_all(dev); |
446 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
447 | |
448 | do_delayed = fb_helper->delayed_hotplug; | |
449 | if (do_delayed) | |
450 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 451 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
452 | |
453 | if (do_delayed) | |
454 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
455 | return ret; |
456 | } | |
457 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 458 | |
2c4124fd GU |
459 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
460 | { | |
461 | struct drm_device *dev = fb_helper->dev; | |
462 | struct drm_crtc *crtc; | |
463 | int bound = 0, crtcs_bound = 0; | |
464 | ||
465 | /* Sometimes user space wants everything disabled, so don't steal the | |
466 | * display if there's a master. */ | |
fa7d81bb | 467 | if (lockless_dereference(dev->master)) |
2c4124fd GU |
468 | return false; |
469 | ||
470 | drm_for_each_crtc(crtc, dev) { | |
471 | if (crtc->primary->fb) | |
472 | crtcs_bound++; | |
473 | if (crtc->primary->fb == fb_helper->fb) | |
474 | bound++; | |
475 | } | |
476 | ||
477 | if (bound < crtcs_bound) | |
478 | return false; | |
479 | ||
480 | return true; | |
481 | } | |
482 | ||
483 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
484 | /* |
485 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
486 | * and panic handling. | |
487 | */ | |
78b9c353 | 488 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 489 | { |
785b93ef DA |
490 | bool ret, error = false; |
491 | struct drm_fb_helper *helper; | |
492 | ||
493 | if (list_empty(&kernel_fb_helper_list)) | |
494 | return false; | |
495 | ||
496 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
497 | struct drm_device *dev = helper->dev; |
498 | ||
499 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
500 | continue; | |
501 | ||
dd908c86 | 502 | drm_modeset_lock_all(dev); |
3d9e35a9 | 503 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
504 | if (ret) |
505 | error = true; | |
cb597bb3 | 506 | drm_modeset_unlock_all(dev); |
785b93ef DA |
507 | } |
508 | return error; | |
509 | } | |
510 | ||
785b93ef DA |
511 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
512 | { | |
d21bf469 DV |
513 | bool ret; |
514 | ret = drm_fb_helper_force_kernel_mode(); | |
515 | if (ret == true) | |
516 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
517 | } |
518 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
519 | ||
1495cc9d | 520 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
521 | { |
522 | schedule_work(&drm_fb_helper_restore_work); | |
523 | } | |
524 | ||
525 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
526 | .handler = drm_fb_helper_sysrq, | |
527 | .help_msg = "force-fb(V)", | |
528 | .action_msg = "Restore framebuffer console", | |
529 | }; | |
b8c40d62 RD |
530 | #else |
531 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 532 | #endif |
785b93ef | 533 | |
3a8148c5 | 534 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
535 | { |
536 | struct drm_fb_helper *fb_helper = info->par; | |
537 | struct drm_device *dev = fb_helper->dev; | |
538 | struct drm_crtc *crtc; | |
023eb571 | 539 | struct drm_connector *connector; |
023eb571 | 540 | int i, j; |
785b93ef DA |
541 | |
542 | /* | |
3a8148c5 | 543 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 544 | */ |
84849903 | 545 | drm_modeset_lock_all(dev); |
20c60c35 DV |
546 | if (!drm_fb_helper_is_bound(fb_helper)) { |
547 | drm_modeset_unlock_all(dev); | |
548 | return; | |
549 | } | |
550 | ||
e87b2c42 | 551 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 552 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 553 | |
8be48d92 DA |
554 | if (!crtc->enabled) |
555 | continue; | |
556 | ||
3a8148c5 | 557 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
558 | for (j = 0; j < fb_helper->connector_count; j++) { |
559 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 560 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 561 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 562 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 563 | } |
785b93ef | 564 | } |
84849903 | 565 | drm_modeset_unlock_all(dev); |
785b93ef DA |
566 | } |
567 | ||
207fd329 DV |
568 | /** |
569 | * drm_fb_helper_blank - implementation for ->fb_blank | |
570 | * @blank: desired blanking state | |
571 | * @info: fbdev registered by the helper | |
572 | */ | |
785b93ef DA |
573 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
574 | { | |
c50bfd08 DV |
575 | if (oops_in_progress) |
576 | return -EBUSY; | |
577 | ||
785b93ef | 578 | switch (blank) { |
731b5a15 | 579 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 580 | case FB_BLANK_UNBLANK: |
3a8148c5 | 581 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 582 | break; |
731b5a15 | 583 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 584 | case FB_BLANK_NORMAL: |
3a8148c5 | 585 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 586 | break; |
731b5a15 | 587 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 588 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 589 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 590 | break; |
731b5a15 | 591 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 592 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 593 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 594 | break; |
731b5a15 | 595 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 596 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 597 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
598 | break; |
599 | } | |
600 | return 0; | |
601 | } | |
602 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
603 | ||
604 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
605 | { | |
606 | int i; | |
607 | ||
6e86d58b DA |
608 | for (i = 0; i < helper->connector_count; i++) { |
609 | drm_connector_unreference(helper->connector_info[i]->connector); | |
0b4c0f3f | 610 | kfree(helper->connector_info[i]); |
6e86d58b | 611 | } |
0b4c0f3f | 612 | kfree(helper->connector_info); |
a1b7736d | 613 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 614 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
615 | if (helper->crtc_info[i].mode_set.mode) |
616 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
617 | } | |
785b93ef DA |
618 | kfree(helper->crtc_info); |
619 | } | |
620 | ||
eaa434de NT |
621 | static void drm_fb_helper_dirty_work(struct work_struct *work) |
622 | { | |
623 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
624 | dirty_work); | |
625 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
626 | struct drm_clip_rect clip_copy; | |
627 | unsigned long flags; | |
628 | ||
629 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
630 | clip_copy = *clip; | |
631 | clip->x1 = clip->y1 = ~0; | |
632 | clip->x2 = clip->y2 = 0; | |
633 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
634 | ||
635 | helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); | |
636 | } | |
637 | ||
10a23102 TR |
638 | /** |
639 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
640 | * @dev: DRM device | |
641 | * @helper: driver-allocated fbdev helper structure to set up | |
642 | * @funcs: pointer to structure of functions associate with this helper | |
643 | * | |
644 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
645 | * useful to implement race-free initialization of the polling helpers. | |
646 | */ | |
647 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
648 | const struct drm_fb_helper_funcs *funcs) | |
649 | { | |
650 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
eaa434de NT |
651 | spin_lock_init(&helper->dirty_lock); |
652 | INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); | |
653 | helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; | |
10a23102 TR |
654 | helper->funcs = funcs; |
655 | helper->dev = dev; | |
656 | } | |
657 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
658 | ||
207fd329 DV |
659 | /** |
660 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
661 | * @dev: drm device | |
662 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
663 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
664 | * @max_conn_count: max connector count | |
665 | * | |
666 | * This allocates the structures for the fbdev helper with the given limits. | |
667 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
668 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
669 | * to allow driver writes more control over the exact init sequence. | |
670 | * | |
10a23102 | 671 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
672 | * |
673 | * RETURNS: | |
674 | * Zero if everything went ok, nonzero otherwise. | |
675 | */ | |
4abe3520 DA |
676 | int drm_fb_helper_init(struct drm_device *dev, |
677 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 678 | int crtc_count, int max_conn_count) |
785b93ef | 679 | { |
785b93ef | 680 | struct drm_crtc *crtc; |
785b93ef DA |
681 | int i; |
682 | ||
f64c5573 DV |
683 | if (!drm_fbdev_emulation) |
684 | return 0; | |
685 | ||
04cfe97e XL |
686 | if (!max_conn_count) |
687 | return -EINVAL; | |
688 | ||
4abe3520 DA |
689 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
690 | if (!fb_helper->crtc_info) | |
785b93ef DA |
691 | return -ENOMEM; |
692 | ||
4abe3520 DA |
693 | fb_helper->crtc_count = crtc_count; |
694 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
695 | if (!fb_helper->connector_info) { | |
696 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
697 | return -ENOMEM; |
698 | } | |
65c2a89c | 699 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 700 | fb_helper->connector_count = 0; |
785b93ef DA |
701 | |
702 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 703 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
704 | kcalloc(max_conn_count, |
705 | sizeof(struct drm_connector *), | |
706 | GFP_KERNEL); | |
707 | ||
4a1b0714 | 708 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 709 | goto out_free; |
4abe3520 | 710 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
711 | } |
712 | ||
713 | i = 0; | |
6295d607 | 714 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 715 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
716 | i++; |
717 | } | |
e9ad3181 | 718 | |
785b93ef DA |
719 | return 0; |
720 | out_free: | |
4abe3520 | 721 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
722 | return -ENOMEM; |
723 | } | |
4abe3520 DA |
724 | EXPORT_SYMBOL(drm_fb_helper_init); |
725 | ||
b8017d6c AT |
726 | /** |
727 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
728 | * @fb_helper: driver-allocated fbdev helper | |
729 | * | |
730 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
731 | * by the driver within the fb_probe fb_helper callback function. | |
732 | * | |
733 | * RETURNS: | |
734 | * fb_info pointer if things went okay, pointer containing error code | |
735 | * otherwise | |
736 | */ | |
737 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
738 | { | |
739 | struct device *dev = fb_helper->dev->dev; | |
740 | struct fb_info *info; | |
741 | int ret; | |
742 | ||
743 | info = framebuffer_alloc(0, dev); | |
744 | if (!info) | |
745 | return ERR_PTR(-ENOMEM); | |
746 | ||
747 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
748 | if (ret) | |
749 | goto err_release; | |
750 | ||
751 | info->apertures = alloc_apertures(1); | |
752 | if (!info->apertures) { | |
753 | ret = -ENOMEM; | |
754 | goto err_free_cmap; | |
755 | } | |
756 | ||
757 | fb_helper->fbdev = info; | |
758 | ||
759 | return info; | |
760 | ||
761 | err_free_cmap: | |
762 | fb_dealloc_cmap(&info->cmap); | |
763 | err_release: | |
764 | framebuffer_release(info); | |
765 | return ERR_PTR(ret); | |
766 | } | |
767 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
768 | ||
769 | /** | |
770 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
771 | * @fb_helper: driver-allocated fbdev helper | |
772 | * | |
773 | * A wrapper around unregister_framebuffer, to release the fb_info | |
774 | * framebuffer device | |
775 | */ | |
776 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
777 | { | |
778 | if (fb_helper && fb_helper->fbdev) | |
779 | unregister_framebuffer(fb_helper->fbdev); | |
780 | } | |
781 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
782 | ||
783 | /** | |
784 | * drm_fb_helper_release_fbi - dealloc fb_info and its members | |
785 | * @fb_helper: driver-allocated fbdev helper | |
786 | * | |
787 | * A helper to free memory taken by fb_info and the members cmap and | |
788 | * apertures | |
789 | */ | |
790 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
791 | { | |
792 | if (fb_helper) { | |
793 | struct fb_info *info = fb_helper->fbdev; | |
794 | ||
795 | if (info) { | |
796 | if (info->cmap.len) | |
797 | fb_dealloc_cmap(&info->cmap); | |
798 | framebuffer_release(info); | |
799 | } | |
800 | ||
801 | fb_helper->fbdev = NULL; | |
802 | } | |
803 | } | |
804 | EXPORT_SYMBOL(drm_fb_helper_release_fbi); | |
805 | ||
4abe3520 DA |
806 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
807 | { | |
f64c5573 DV |
808 | if (!drm_fbdev_emulation) |
809 | return; | |
810 | ||
4abe3520 DA |
811 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
812 | list_del(&fb_helper->kernel_fb_list); | |
813 | if (list_empty(&kernel_fb_helper_list)) { | |
4abe3520 DA |
814 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
815 | } | |
816 | } | |
817 | ||
818 | drm_fb_helper_crtc_free(fb_helper); | |
819 | ||
4abe3520 DA |
820 | } |
821 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 822 | |
47074ab7 AT |
823 | /** |
824 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
825 | * @fb_helper: driver-allocated fbdev helper | |
826 | * | |
827 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
828 | */ | |
829 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
830 | { | |
831 | if (fb_helper && fb_helper->fbdev) | |
832 | unlink_framebuffer(fb_helper->fbdev); | |
833 | } | |
834 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
835 | ||
eaa434de NT |
836 | static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, |
837 | u32 width, u32 height) | |
838 | { | |
839 | struct drm_fb_helper *helper = info->par; | |
840 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
841 | unsigned long flags; | |
842 | ||
843 | if (!helper->fb->funcs->dirty) | |
844 | return; | |
845 | ||
846 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
847 | clip->x1 = min_t(u32, clip->x1, x); | |
848 | clip->y1 = min_t(u32, clip->y1, y); | |
849 | clip->x2 = max_t(u32, clip->x2, x + width); | |
850 | clip->y2 = max_t(u32, clip->y2, y + height); | |
851 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
852 | ||
853 | schedule_work(&helper->dirty_work); | |
854 | } | |
855 | ||
856 | /** | |
857 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function | |
858 | * @info: fb_info struct pointer | |
859 | * @pagelist: list of dirty mmap framebuffer pages | |
860 | * | |
861 | * This function is used as the &fb_deferred_io ->deferred_io | |
862 | * callback function for flushing the fbdev mmap writes. | |
863 | */ | |
864 | void drm_fb_helper_deferred_io(struct fb_info *info, | |
865 | struct list_head *pagelist) | |
866 | { | |
867 | unsigned long start, end, min, max; | |
868 | struct page *page; | |
869 | u32 y1, y2; | |
870 | ||
871 | min = ULONG_MAX; | |
872 | max = 0; | |
873 | list_for_each_entry(page, pagelist, lru) { | |
874 | start = page->index << PAGE_SHIFT; | |
875 | end = start + PAGE_SIZE - 1; | |
876 | min = min(min, start); | |
877 | max = max(max, end); | |
878 | } | |
879 | ||
880 | if (min < max) { | |
881 | y1 = min / info->fix.line_length; | |
882 | y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), | |
883 | info->var.yres); | |
884 | drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); | |
885 | } | |
886 | } | |
887 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); | |
888 | ||
cbb1a82e AT |
889 | /** |
890 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
891 | * @info: fb_info struct pointer | |
892 | * @buf: userspace buffer to read from framebuffer memory | |
893 | * @count: number of bytes to read from framebuffer memory | |
894 | * @ppos: read offset within framebuffer memory | |
895 | * | |
896 | * A wrapper around fb_sys_read implemented by fbdev core | |
897 | */ | |
898 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
899 | size_t count, loff_t *ppos) | |
900 | { | |
901 | return fb_sys_read(info, buf, count, ppos); | |
902 | } | |
903 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
904 | ||
905 | /** | |
906 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
907 | * @info: fb_info struct pointer | |
908 | * @buf: userspace buffer to write to framebuffer memory | |
909 | * @count: number of bytes to write to framebuffer memory | |
910 | * @ppos: write offset within framebuffer memory | |
911 | * | |
912 | * A wrapper around fb_sys_write implemented by fbdev core | |
913 | */ | |
914 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
915 | size_t count, loff_t *ppos) | |
916 | { | |
eaa434de NT |
917 | ssize_t ret; |
918 | ||
919 | ret = fb_sys_write(info, buf, count, ppos); | |
920 | if (ret > 0) | |
921 | drm_fb_helper_dirty(info, 0, 0, info->var.xres, | |
922 | info->var.yres); | |
923 | ||
924 | return ret; | |
cbb1a82e AT |
925 | } |
926 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
927 | ||
742547b7 AT |
928 | /** |
929 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
930 | * @info: fbdev registered by the helper | |
931 | * @rect: info about rectangle to fill | |
932 | * | |
933 | * A wrapper around sys_fillrect implemented by fbdev core | |
934 | */ | |
935 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
936 | const struct fb_fillrect *rect) | |
937 | { | |
938 | sys_fillrect(info, rect); | |
eaa434de NT |
939 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
940 | rect->width, rect->height); | |
742547b7 AT |
941 | } |
942 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
943 | ||
944 | /** | |
945 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
946 | * @info: fbdev registered by the helper | |
947 | * @area: info about area to copy | |
948 | * | |
949 | * A wrapper around sys_copyarea implemented by fbdev core | |
950 | */ | |
951 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
952 | const struct fb_copyarea *area) | |
953 | { | |
954 | sys_copyarea(info, area); | |
eaa434de NT |
955 | drm_fb_helper_dirty(info, area->dx, area->dy, |
956 | area->width, area->height); | |
742547b7 AT |
957 | } |
958 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
959 | ||
960 | /** | |
961 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
962 | * @info: fbdev registered by the helper | |
963 | * @image: info about image to blit | |
964 | * | |
965 | * A wrapper around sys_imageblit implemented by fbdev core | |
966 | */ | |
967 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
968 | const struct fb_image *image) | |
969 | { | |
970 | sys_imageblit(info, image); | |
eaa434de NT |
971 | drm_fb_helper_dirty(info, image->dx, image->dy, |
972 | image->width, image->height); | |
742547b7 AT |
973 | } |
974 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
975 | ||
976 | /** | |
977 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
978 | * @info: fbdev registered by the helper | |
979 | * @rect: info about rectangle to fill | |
980 | * | |
981 | * A wrapper around cfb_imageblit implemented by fbdev core | |
982 | */ | |
983 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
984 | const struct fb_fillrect *rect) | |
985 | { | |
986 | cfb_fillrect(info, rect); | |
eaa434de NT |
987 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
988 | rect->width, rect->height); | |
742547b7 AT |
989 | } |
990 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
991 | ||
992 | /** | |
993 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
994 | * @info: fbdev registered by the helper | |
995 | * @area: info about area to copy | |
996 | * | |
997 | * A wrapper around cfb_copyarea implemented by fbdev core | |
998 | */ | |
999 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
1000 | const struct fb_copyarea *area) | |
1001 | { | |
1002 | cfb_copyarea(info, area); | |
eaa434de NT |
1003 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1004 | area->width, area->height); | |
742547b7 AT |
1005 | } |
1006 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
1007 | ||
1008 | /** | |
1009 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
1010 | * @info: fbdev registered by the helper | |
1011 | * @image: info about image to blit | |
1012 | * | |
1013 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1014 | */ | |
1015 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
1016 | const struct fb_image *image) | |
1017 | { | |
1018 | cfb_imageblit(info, image); | |
eaa434de NT |
1019 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1020 | image->width, image->height); | |
742547b7 AT |
1021 | } |
1022 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
1023 | ||
fdefa58a AT |
1024 | /** |
1025 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
1026 | * @fb_helper: driver-allocated fbdev helper | |
1027 | * @state: desired state, zero to resume, non-zero to suspend | |
1028 | * | |
1029 | * A wrapper around fb_set_suspend implemented by fbdev core | |
1030 | */ | |
1031 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state) | |
1032 | { | |
1033 | if (fb_helper && fb_helper->fbdev) | |
1034 | fb_set_suspend(fb_helper->fbdev, state); | |
1035 | } | |
1036 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
1037 | ||
c850cb78 | 1038 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
1039 | u16 blue, u16 regno, struct fb_info *info) |
1040 | { | |
1041 | struct drm_fb_helper *fb_helper = info->par; | |
1042 | struct drm_framebuffer *fb = fb_helper->fb; | |
b8c00ac5 | 1043 | |
c850cb78 DA |
1044 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
1045 | u32 *palette; | |
1046 | u32 value; | |
1047 | /* place color in psuedopalette */ | |
1048 | if (regno > 16) | |
1049 | return -EINVAL; | |
1050 | palette = (u32 *)info->pseudo_palette; | |
1051 | red >>= (16 - info->var.red.length); | |
1052 | green >>= (16 - info->var.green.length); | |
1053 | blue >>= (16 - info->var.blue.length); | |
1054 | value = (red << info->var.red.offset) | | |
1055 | (green << info->var.green.offset) | | |
1056 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1057 | if (info->var.transp.length > 0) { |
1058 | u32 mask = (1 << info->var.transp.length) - 1; | |
1059 | mask <<= info->var.transp.offset; | |
1060 | value |= mask; | |
1061 | } | |
c850cb78 DA |
1062 | palette[regno] = value; |
1063 | return 0; | |
1064 | } | |
1065 | ||
04c0c569 VS |
1066 | /* |
1067 | * The driver really shouldn't advertise pseudo/directcolor | |
1068 | * visuals if it can't deal with the palette. | |
1069 | */ | |
1070 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1071 | !fb_helper->funcs->gamma_get)) | |
1072 | return -EINVAL; | |
1073 | ||
fef1480d | 1074 | WARN_ON(fb->bits_per_pixel != 8); |
b8c00ac5 | 1075 | |
fef1480d | 1076 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); |
b8c00ac5 | 1077 | |
c850cb78 | 1078 | return 0; |
b8c00ac5 DA |
1079 | } |
1080 | ||
207fd329 DV |
1081 | /** |
1082 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
1083 | * @cmap: cmap to set | |
1084 | * @info: fbdev registered by the helper | |
1085 | */ | |
068143d3 DA |
1086 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1087 | { | |
1088 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1089 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1090 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1091 | u16 *red, *green, *blue, *transp; |
1092 | struct drm_crtc *crtc; | |
062ac622 | 1093 | int i, j, rc = 0; |
068143d3 DA |
1094 | int start; |
1095 | ||
c50bfd08 | 1096 | if (oops_in_progress) |
9aa609e1 | 1097 | return -EBUSY; |
c50bfd08 DV |
1098 | |
1099 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1100 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1101 | drm_modeset_unlock_all(dev); | |
1102 | return -EBUSY; | |
1103 | } | |
1104 | ||
8be48d92 DA |
1105 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1106 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1107 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1108 | |
1109 | red = cmap->red; | |
1110 | green = cmap->green; | |
1111 | blue = cmap->blue; | |
1112 | transp = cmap->transp; | |
1113 | start = cmap->start; | |
1114 | ||
062ac622 | 1115 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1116 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1117 | ||
1118 | hred = *red++; | |
1119 | hgreen = *green++; | |
1120 | hblue = *blue++; | |
1121 | ||
1122 | if (transp) | |
1123 | htransp = *transp++; | |
1124 | ||
c850cb78 DA |
1125 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1126 | if (rc) | |
8391a3d5 | 1127 | goto out; |
068143d3 | 1128 | } |
04c0c569 VS |
1129 | if (crtc_funcs->load_lut) |
1130 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1131 | } |
8391a3d5 VS |
1132 | out: |
1133 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1134 | return rc; |
1135 | } | |
1136 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1137 | ||
207fd329 DV |
1138 | /** |
1139 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
1140 | * @var: screeninfo to check | |
1141 | * @info: fbdev registered by the helper | |
1142 | */ | |
785b93ef DA |
1143 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1144 | struct fb_info *info) | |
1145 | { | |
1146 | struct drm_fb_helper *fb_helper = info->par; | |
1147 | struct drm_framebuffer *fb = fb_helper->fb; | |
1148 | int depth; | |
1149 | ||
f90ebd9e | 1150 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1151 | return -EINVAL; |
1152 | ||
1153 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
1154 | if (var->bits_per_pixel > fb->bits_per_pixel || |
1155 | var->xres > fb->width || var->yres > fb->height || | |
1156 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 1157 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
1158 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1159 | var->xres, var->yres, var->bits_per_pixel, | |
1160 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 1161 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
1162 | return -EINVAL; |
1163 | } | |
1164 | ||
1165 | switch (var->bits_per_pixel) { | |
1166 | case 16: | |
1167 | depth = (var->green.length == 6) ? 16 : 15; | |
1168 | break; | |
1169 | case 32: | |
1170 | depth = (var->transp.length > 0) ? 32 : 24; | |
1171 | break; | |
1172 | default: | |
1173 | depth = var->bits_per_pixel; | |
1174 | break; | |
1175 | } | |
1176 | ||
1177 | switch (depth) { | |
1178 | case 8: | |
1179 | var->red.offset = 0; | |
1180 | var->green.offset = 0; | |
1181 | var->blue.offset = 0; | |
1182 | var->red.length = 8; | |
1183 | var->green.length = 8; | |
1184 | var->blue.length = 8; | |
1185 | var->transp.length = 0; | |
1186 | var->transp.offset = 0; | |
1187 | break; | |
1188 | case 15: | |
1189 | var->red.offset = 10; | |
1190 | var->green.offset = 5; | |
1191 | var->blue.offset = 0; | |
1192 | var->red.length = 5; | |
1193 | var->green.length = 5; | |
1194 | var->blue.length = 5; | |
1195 | var->transp.length = 1; | |
1196 | var->transp.offset = 15; | |
1197 | break; | |
1198 | case 16: | |
1199 | var->red.offset = 11; | |
1200 | var->green.offset = 5; | |
1201 | var->blue.offset = 0; | |
1202 | var->red.length = 5; | |
1203 | var->green.length = 6; | |
1204 | var->blue.length = 5; | |
1205 | var->transp.length = 0; | |
1206 | var->transp.offset = 0; | |
1207 | break; | |
1208 | case 24: | |
1209 | var->red.offset = 16; | |
1210 | var->green.offset = 8; | |
1211 | var->blue.offset = 0; | |
1212 | var->red.length = 8; | |
1213 | var->green.length = 8; | |
1214 | var->blue.length = 8; | |
1215 | var->transp.length = 0; | |
1216 | var->transp.offset = 0; | |
1217 | break; | |
1218 | case 32: | |
1219 | var->red.offset = 16; | |
1220 | var->green.offset = 8; | |
1221 | var->blue.offset = 0; | |
1222 | var->red.length = 8; | |
1223 | var->green.length = 8; | |
1224 | var->blue.length = 8; | |
1225 | var->transp.length = 8; | |
1226 | var->transp.offset = 24; | |
1227 | break; | |
1228 | default: | |
1229 | return -EINVAL; | |
1230 | } | |
1231 | return 0; | |
1232 | } | |
1233 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1234 | ||
207fd329 DV |
1235 | /** |
1236 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
1237 | * @info: fbdev registered by the helper | |
1238 | * | |
1239 | * This will let fbcon do the mode init and is called at initialization time by | |
1240 | * the fbdev core when registering the driver, and later on through the hotplug | |
1241 | * callback. | |
1242 | */ | |
785b93ef DA |
1243 | int drm_fb_helper_set_par(struct fb_info *info) |
1244 | { | |
1245 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1246 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1247 | |
c50bfd08 DV |
1248 | if (oops_in_progress) |
1249 | return -EBUSY; | |
1250 | ||
5349ef31 | 1251 | if (var->pixclock != 0) { |
172e91f5 | 1252 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1253 | return -EINVAL; |
1254 | } | |
1255 | ||
5ea1f752 | 1256 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1257 | |
785b93ef DA |
1258 | return 0; |
1259 | } | |
1260 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1261 | ||
1edf0269 | 1262 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1263 | struct fb_info *info) |
1edf0269 RC |
1264 | { |
1265 | struct drm_fb_helper *fb_helper = info->par; | |
1266 | struct drm_device *dev = fb_helper->dev; | |
1267 | struct drm_atomic_state *state; | |
07d3bad6 | 1268 | struct drm_plane *plane; |
1edf0269 | 1269 | int i, ret; |
07d3bad6 | 1270 | unsigned plane_mask; |
1edf0269 RC |
1271 | |
1272 | state = drm_atomic_state_alloc(dev); | |
1273 | if (!state) | |
1274 | return -ENOMEM; | |
1275 | ||
1276 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1277 | retry: | |
07d3bad6 | 1278 | plane_mask = 0; |
1edf0269 RC |
1279 | for(i = 0; i < fb_helper->crtc_count; i++) { |
1280 | struct drm_mode_set *mode_set; | |
1281 | ||
1282 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1283 | ||
1284 | mode_set->x = var->xoffset; | |
1285 | mode_set->y = var->yoffset; | |
1286 | ||
1287 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1288 | if (ret != 0) | |
1289 | goto fail; | |
07d3bad6 ML |
1290 | |
1291 | plane = mode_set->crtc->primary; | |
7118fd9b | 1292 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1293 | plane->old_fb = plane->fb; |
1edf0269 RC |
1294 | } |
1295 | ||
1296 | ret = drm_atomic_commit(state); | |
1297 | if (ret != 0) | |
1298 | goto fail; | |
1299 | ||
1300 | info->var.xoffset = var->xoffset; | |
1301 | info->var.yoffset = var->yoffset; | |
1302 | ||
1edf0269 RC |
1303 | |
1304 | fail: | |
07d3bad6 | 1305 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1306 | |
1edf0269 RC |
1307 | if (ret == -EDEADLK) |
1308 | goto backoff; | |
1309 | ||
a0fb6ad7 DV |
1310 | if (ret != 0) |
1311 | drm_atomic_state_free(state); | |
1edf0269 RC |
1312 | |
1313 | return ret; | |
1314 | ||
1315 | backoff: | |
1316 | drm_atomic_state_clear(state); | |
1317 | drm_atomic_legacy_backoff(state); | |
1318 | ||
1319 | goto retry; | |
1320 | } | |
1321 | ||
207fd329 DV |
1322 | /** |
1323 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
1324 | * @var: updated screen information | |
1325 | * @info: fbdev registered by the helper | |
1326 | */ | |
785b93ef DA |
1327 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1328 | struct fb_info *info) | |
1329 | { | |
1330 | struct drm_fb_helper *fb_helper = info->par; | |
1331 | struct drm_device *dev = fb_helper->dev; | |
1332 | struct drm_mode_set *modeset; | |
785b93ef DA |
1333 | int ret = 0; |
1334 | int i; | |
1335 | ||
c50bfd08 | 1336 | if (oops_in_progress) |
9aa609e1 | 1337 | return -EBUSY; |
c50bfd08 DV |
1338 | |
1339 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1340 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1341 | drm_modeset_unlock_all(dev); | |
1342 | return -EBUSY; | |
1343 | } | |
1344 | ||
d3a46183 | 1345 | if (dev->mode_config.funcs->atomic_commit) { |
1edf0269 RC |
1346 | ret = pan_display_atomic(var, info); |
1347 | goto unlock; | |
1348 | } | |
1349 | ||
8be48d92 | 1350 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1351 | modeset = &fb_helper->crtc_info[i].mode_set; |
1352 | ||
1353 | modeset->x = var->xoffset; | |
1354 | modeset->y = var->yoffset; | |
1355 | ||
1356 | if (modeset->num_connectors) { | |
2d13b679 | 1357 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1358 | if (!ret) { |
1359 | info->var.xoffset = var->xoffset; | |
1360 | info->var.yoffset = var->yoffset; | |
1361 | } | |
1362 | } | |
1363 | } | |
1edf0269 | 1364 | unlock: |
84849903 | 1365 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1366 | return ret; |
1367 | } | |
1368 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1369 | ||
8acf658a | 1370 | /* |
207fd329 DV |
1371 | * Allocates the backing storage and sets up the fbdev info structure through |
1372 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1373 | * notifier. | |
8acf658a | 1374 | */ |
de1ace5b DV |
1375 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1376 | int preferred_bpp) | |
785b93ef | 1377 | { |
8acf658a | 1378 | int ret = 0; |
785b93ef | 1379 | int crtc_count = 0; |
4abe3520 | 1380 | int i; |
785b93ef | 1381 | struct fb_info *info; |
38651674 | 1382 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1383 | int gamma_size = 0; |
38651674 DA |
1384 | |
1385 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1386 | sizes.surface_depth = 24; | |
1387 | sizes.surface_bpp = 32; | |
1388 | sizes.fb_width = (unsigned)-1; | |
1389 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 1390 | |
b8c00ac5 DA |
1391 | /* if driver picks 8 or 16 by default use that |
1392 | for both depth/bpp */ | |
96081cdf | 1393 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1394 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1395 | |
785b93ef | 1396 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
1397 | for (i = 0; i < fb_helper->connector_count; i++) { |
1398 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 1399 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1400 | |
eaf99c74 | 1401 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1402 | |
1403 | if (cmdline_mode->bpp_specified) { | |
1404 | switch (cmdline_mode->bpp) { | |
1405 | case 8: | |
38651674 | 1406 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1407 | break; |
1408 | case 15: | |
38651674 DA |
1409 | sizes.surface_depth = 15; |
1410 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1411 | break; |
1412 | case 16: | |
38651674 | 1413 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1414 | break; |
1415 | case 24: | |
38651674 | 1416 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1417 | break; |
1418 | case 32: | |
38651674 DA |
1419 | sizes.surface_depth = 24; |
1420 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1421 | break; |
1422 | } | |
1423 | break; | |
1424 | } | |
1425 | } | |
1426 | ||
8be48d92 DA |
1427 | crtc_count = 0; |
1428 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1429 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1430 | struct drm_mode_set *mode_set; |
1431 | int x, y, j; | |
1432 | /* in case of tile group, are we the last tile vert or horiz? | |
1433 | * If no tile group you are always the last one both vertically | |
1434 | * and horizontally | |
1435 | */ | |
1436 | bool lastv = true, lasth = true; | |
675c8328 | 1437 | |
8be48d92 | 1438 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1439 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1440 | |
1441 | if (!desired_mode) | |
1442 | continue; | |
1443 | ||
1444 | crtc_count++; | |
1445 | ||
b0ee9e7f DA |
1446 | x = fb_helper->crtc_info[i].x; |
1447 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1448 | |
1449 | if (gamma_size == 0) | |
1450 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1451 | ||
1452 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1453 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1454 | |
1455 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1456 | struct drm_connector *connector = mode_set->connectors[j]; | |
1457 | if (connector->has_tile) { | |
1458 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1459 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1460 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1461 | break; | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | if (lasth) | |
1466 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1467 | if (lastv) | |
1468 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1469 | } |
1470 | ||
38651674 | 1471 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1472 | /* hmm everyone went away - assume VGA cable just fell out |
1473 | and will come back later. */ | |
eb1f8e4f | 1474 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1475 | sizes.fb_width = sizes.surface_width = 1024; |
1476 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1477 | } |
1478 | ||
38651674 | 1479 | /* push down into drivers */ |
8acf658a DV |
1480 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1481 | if (ret < 0) | |
1482 | return ret; | |
785b93ef | 1483 | |
38651674 | 1484 | info = fb_helper->fbdev; |
785b93ef | 1485 | |
7e53f3a4 DV |
1486 | /* |
1487 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1488 | * events, but at init time drm_setup_crtcs needs to be called before | |
1489 | * the fb is allocated (since we need to figure out the desired size of | |
1490 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1491 | * here again. | |
1492 | */ | |
96081cdf | 1493 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1494 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1495 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1496 | ||
785b93ef | 1497 | |
8acf658a DV |
1498 | info->var.pixclock = 0; |
1499 | if (register_framebuffer(info) < 0) | |
1500 | return -EINVAL; | |
38651674 | 1501 | |
8acf658a DV |
1502 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1503 | info->node, info->fix.id); | |
785b93ef | 1504 | |
785b93ef | 1505 | if (list_empty(&kernel_fb_helper_list)) { |
785b93ef DA |
1506 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
1507 | } | |
8acf658a DV |
1508 | |
1509 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1510 | |
785b93ef DA |
1511 | return 0; |
1512 | } | |
785b93ef | 1513 | |
207fd329 DV |
1514 | /** |
1515 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1516 | * @info: fbdev registered by the helper | |
1517 | * @pitch: desired pitch | |
1518 | * @depth: desired depth | |
1519 | * | |
1520 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1521 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1522 | * additional constraints need to set up their own limits. | |
1523 | * | |
1524 | * Drivers should call this (or their equivalent setup code) from their | |
1525 | * ->fb_probe callback. | |
1526 | */ | |
3632ef89 DA |
1527 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1528 | uint32_t depth) | |
1529 | { | |
1530 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1531 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1532 | FB_VISUAL_TRUECOLOR; | |
1533 | info->fix.mmio_start = 0; | |
1534 | info->fix.mmio_len = 0; | |
1535 | info->fix.type_aux = 0; | |
1536 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1537 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1538 | info->fix.ywrapstep = 0; | |
1539 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1540 | |
1541 | info->fix.line_length = pitch; | |
1542 | return; | |
1543 | } | |
1544 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1545 | ||
207fd329 DV |
1546 | /** |
1547 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1548 | * @info: fbdev instance to set up | |
1549 | * @fb_helper: fb helper instance to use as template | |
1550 | * @fb_width: desired fb width | |
1551 | * @fb_height: desired fb height | |
1552 | * | |
1553 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1554 | * and the drm framebuffer allocated in fb_helper->fb. | |
1555 | * | |
1556 | * Drivers should call this (or their equivalent setup code) from their | |
1557 | * ->fb_probe callback after having allocated the fbdev backing | |
1558 | * storage framebuffer. | |
1559 | */ | |
38651674 | 1560 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1561 | uint32_t fb_width, uint32_t fb_height) |
1562 | { | |
38651674 DA |
1563 | struct drm_framebuffer *fb = fb_helper->fb; |
1564 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1565 | info->var.xres_virtual = fb->width; |
1566 | info->var.yres_virtual = fb->height; | |
1567 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1568 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1569 | info->var.xoffset = 0; |
1570 | info->var.yoffset = 0; | |
1571 | info->var.activate = FB_ACTIVATE_NOW; | |
1572 | info->var.height = -1; | |
1573 | info->var.width = -1; | |
1574 | ||
1575 | switch (fb->depth) { | |
1576 | case 8: | |
1577 | info->var.red.offset = 0; | |
1578 | info->var.green.offset = 0; | |
1579 | info->var.blue.offset = 0; | |
1580 | info->var.red.length = 8; /* 8bit DAC */ | |
1581 | info->var.green.length = 8; | |
1582 | info->var.blue.length = 8; | |
1583 | info->var.transp.offset = 0; | |
1584 | info->var.transp.length = 0; | |
1585 | break; | |
1586 | case 15: | |
1587 | info->var.red.offset = 10; | |
1588 | info->var.green.offset = 5; | |
1589 | info->var.blue.offset = 0; | |
1590 | info->var.red.length = 5; | |
1591 | info->var.green.length = 5; | |
1592 | info->var.blue.length = 5; | |
1593 | info->var.transp.offset = 15; | |
1594 | info->var.transp.length = 1; | |
1595 | break; | |
1596 | case 16: | |
1597 | info->var.red.offset = 11; | |
1598 | info->var.green.offset = 5; | |
1599 | info->var.blue.offset = 0; | |
1600 | info->var.red.length = 5; | |
1601 | info->var.green.length = 6; | |
1602 | info->var.blue.length = 5; | |
1603 | info->var.transp.offset = 0; | |
1604 | break; | |
1605 | case 24: | |
1606 | info->var.red.offset = 16; | |
1607 | info->var.green.offset = 8; | |
1608 | info->var.blue.offset = 0; | |
1609 | info->var.red.length = 8; | |
1610 | info->var.green.length = 8; | |
1611 | info->var.blue.length = 8; | |
1612 | info->var.transp.offset = 0; | |
1613 | info->var.transp.length = 0; | |
1614 | break; | |
1615 | case 32: | |
1616 | info->var.red.offset = 16; | |
1617 | info->var.green.offset = 8; | |
1618 | info->var.blue.offset = 0; | |
1619 | info->var.red.length = 8; | |
1620 | info->var.green.length = 8; | |
1621 | info->var.blue.length = 8; | |
1622 | info->var.transp.offset = 24; | |
1623 | info->var.transp.length = 8; | |
1624 | break; | |
1625 | default: | |
1626 | break; | |
1627 | } | |
1628 | ||
1629 | info->var.xres = fb_width; | |
1630 | info->var.yres = fb_height; | |
1631 | } | |
1632 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1633 | |
0b4c0f3f DA |
1634 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1635 | uint32_t maxX, | |
1636 | uint32_t maxY) | |
38651674 DA |
1637 | { |
1638 | struct drm_connector *connector; | |
1639 | int count = 0; | |
0b4c0f3f | 1640 | int i; |
38651674 | 1641 | |
0b4c0f3f DA |
1642 | for (i = 0; i < fb_helper->connector_count; i++) { |
1643 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1644 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1645 | } | |
1646 | ||
1647 | return count; | |
1648 | } | |
1649 | ||
2f1046f3 | 1650 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1651 | { |
1652 | struct drm_display_mode *mode; | |
1653 | ||
0b4c0f3f | 1654 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1655 | if (mode->hdisplay > width || |
1656 | mode->vdisplay > height) | |
38651674 DA |
1657 | continue; |
1658 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1659 | return mode; | |
1660 | } | |
1661 | return NULL; | |
1662 | } | |
2f1046f3 | 1663 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1664 | |
0b4c0f3f | 1665 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1666 | { |
eaf99c74 | 1667 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1668 | } |
1669 | ||
2f1046f3 | 1670 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1671 | int width, int height) |
38651674 | 1672 | { |
1794d257 | 1673 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1674 | struct drm_display_mode *mode; |
c683f427 | 1675 | bool prefer_non_interlace; |
38651674 | 1676 | |
eaf99c74 | 1677 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1678 | if (cmdline_mode->specified == false) |
f3af5c7d | 1679 | return NULL; |
38651674 DA |
1680 | |
1681 | /* attempt to find a matching mode in the list of modes | |
1682 | * we have gotten so far, if not add a CVT mode that conforms | |
1683 | */ | |
1684 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1685 | goto create_mode; | |
1686 | ||
c683f427 | 1687 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1688 | again: |
0b4c0f3f | 1689 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1690 | /* check width/height */ |
1691 | if (mode->hdisplay != cmdline_mode->xres || | |
1692 | mode->vdisplay != cmdline_mode->yres) | |
1693 | continue; | |
1694 | ||
1695 | if (cmdline_mode->refresh_specified) { | |
1696 | if (mode->vrefresh != cmdline_mode->refresh) | |
1697 | continue; | |
1698 | } | |
1699 | ||
1700 | if (cmdline_mode->interlace) { | |
1701 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1702 | continue; | |
c683f427 TI |
1703 | } else if (prefer_non_interlace) { |
1704 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1705 | continue; | |
38651674 DA |
1706 | } |
1707 | return mode; | |
1708 | } | |
1709 | ||
c683f427 TI |
1710 | if (prefer_non_interlace) { |
1711 | prefer_non_interlace = false; | |
1712 | goto again; | |
1713 | } | |
1714 | ||
38651674 | 1715 | create_mode: |
1794d257 CW |
1716 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1717 | cmdline_mode); | |
0b4c0f3f | 1718 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1719 | return mode; |
1720 | } | |
2f1046f3 | 1721 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1722 | |
1723 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1724 | { | |
1725 | bool enable; | |
1726 | ||
96081cdf | 1727 | if (strict) |
38651674 | 1728 | enable = connector->status == connector_status_connected; |
96081cdf | 1729 | else |
38651674 | 1730 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1731 | |
38651674 DA |
1732 | return enable; |
1733 | } | |
1734 | ||
0b4c0f3f DA |
1735 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1736 | bool *enabled) | |
38651674 DA |
1737 | { |
1738 | bool any_enabled = false; | |
1739 | struct drm_connector *connector; | |
1740 | int i = 0; | |
1741 | ||
0b4c0f3f DA |
1742 | for (i = 0; i < fb_helper->connector_count; i++) { |
1743 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1744 | enabled[i] = drm_connector_enabled(connector, true); |
1745 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1746 | enabled[i] ? "yes" : "no"); | |
1747 | any_enabled |= enabled[i]; | |
38651674 DA |
1748 | } |
1749 | ||
1750 | if (any_enabled) | |
1751 | return; | |
1752 | ||
0b4c0f3f DA |
1753 | for (i = 0; i < fb_helper->connector_count; i++) { |
1754 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1755 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1756 | } |
1757 | } | |
1758 | ||
1d42bbc8 DA |
1759 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1760 | struct drm_display_mode **modes, | |
b0ee9e7f | 1761 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1762 | bool *enabled, int width, int height) |
1763 | { | |
1764 | int count, i, j; | |
1765 | bool can_clone = false; | |
1766 | struct drm_fb_helper_connector *fb_helper_conn; | |
1767 | struct drm_display_mode *dmt_mode, *mode; | |
1768 | ||
1769 | /* only contemplate cloning in the single crtc case */ | |
1770 | if (fb_helper->crtc_count > 1) | |
1771 | return false; | |
1772 | ||
1773 | count = 0; | |
1774 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1775 | if (enabled[i]) | |
1776 | count++; | |
1777 | } | |
1778 | ||
1779 | /* only contemplate cloning if more than one connector is enabled */ | |
1780 | if (count <= 1) | |
1781 | return false; | |
1782 | ||
1783 | /* check the command line or if nothing common pick 1024x768 */ | |
1784 | can_clone = true; | |
1785 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1786 | if (!enabled[i]) | |
1787 | continue; | |
1788 | fb_helper_conn = fb_helper->connector_info[i]; | |
1789 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1790 | if (!modes[i]) { | |
1791 | can_clone = false; | |
1792 | break; | |
1793 | } | |
1794 | for (j = 0; j < i; j++) { | |
1795 | if (!enabled[j]) | |
1796 | continue; | |
1797 | if (!drm_mode_equal(modes[j], modes[i])) | |
1798 | can_clone = false; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | if (can_clone) { | |
1803 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1804 | return true; | |
1805 | } | |
1806 | ||
1807 | /* try and find a 1024x768 mode on each connector */ | |
1808 | can_clone = true; | |
f6e252ba | 1809 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1810 | |
1811 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1812 | ||
1813 | if (!enabled[i]) | |
1814 | continue; | |
1815 | ||
1816 | fb_helper_conn = fb_helper->connector_info[i]; | |
1817 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1818 | if (drm_mode_equal(mode, dmt_mode)) | |
1819 | modes[i] = mode; | |
1820 | } | |
1821 | if (!modes[i]) | |
1822 | can_clone = false; | |
1823 | } | |
1824 | ||
1825 | if (can_clone) { | |
1826 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1827 | return true; | |
1828 | } | |
1829 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1830 | return false; | |
1831 | } | |
1832 | ||
b0ee9e7f DA |
1833 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1834 | struct drm_display_mode **modes, | |
1835 | struct drm_fb_offset *offsets, | |
1836 | int idx, | |
1837 | int h_idx, int v_idx) | |
1838 | { | |
1839 | struct drm_fb_helper_connector *fb_helper_conn; | |
1840 | int i; | |
1841 | int hoffset = 0, voffset = 0; | |
1842 | ||
1843 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1844 | fb_helper_conn = fb_helper->connector_info[i]; | |
1845 | if (!fb_helper_conn->connector->has_tile) | |
1846 | continue; | |
1847 | ||
1848 | if (!modes[i] && (h_idx || v_idx)) { | |
1849 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1850 | fb_helper_conn->connector->base.id); | |
1851 | continue; | |
1852 | } | |
1853 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1854 | hoffset += modes[i]->hdisplay; | |
1855 | ||
1856 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1857 | voffset += modes[i]->vdisplay; | |
1858 | } | |
1859 | offsets[idx].x = hoffset; | |
1860 | offsets[idx].y = voffset; | |
1861 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1862 | return 0; | |
1863 | } | |
1864 | ||
0b4c0f3f | 1865 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1866 | struct drm_display_mode **modes, |
b0ee9e7f | 1867 | struct drm_fb_offset *offsets, |
38651674 DA |
1868 | bool *enabled, int width, int height) |
1869 | { | |
0b4c0f3f DA |
1870 | struct drm_fb_helper_connector *fb_helper_conn; |
1871 | int i; | |
b0ee9e7f DA |
1872 | uint64_t conn_configured = 0, mask; |
1873 | int tile_pass = 0; | |
1874 | mask = (1 << fb_helper->connector_count) - 1; | |
1875 | retry: | |
0b4c0f3f DA |
1876 | for (i = 0; i < fb_helper->connector_count; i++) { |
1877 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1878 | |
b0ee9e7f DA |
1879 | if (conn_configured & (1 << i)) |
1880 | continue; | |
1881 | ||
1882 | if (enabled[i] == false) { | |
1883 | conn_configured |= (1 << i); | |
1884 | continue; | |
1885 | } | |
1886 | ||
1887 | /* first pass over all the untiled connectors */ | |
1888 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1889 | continue; |
38651674 | 1890 | |
b0ee9e7f DA |
1891 | if (tile_pass == 1) { |
1892 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1893 | fb_helper_conn->connector->tile_v_loc != 0) | |
1894 | continue; | |
1895 | ||
1896 | } else { | |
1897 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1898 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1899 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1900 | continue; | |
1901 | ||
1902 | /* find the tile offsets for this pass - need | |
1903 | to find all tiles left and above */ | |
1904 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1905 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1906 | } | |
38651674 | 1907 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1908 | fb_helper_conn->connector->base.id); |
38651674 DA |
1909 | |
1910 | /* got for command line mode first */ | |
0b4c0f3f | 1911 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 | 1912 | if (!modes[i]) { |
b0ee9e7f DA |
1913 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
1914 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 1915 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
1916 | } |
1917 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1918 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1919 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1920 | break; |
1921 | } | |
1922 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1923 | "none"); | |
b0ee9e7f DA |
1924 | conn_configured |= (1 << i); |
1925 | } | |
1926 | ||
1927 | if ((conn_configured & mask) != mask) { | |
1928 | tile_pass++; | |
1929 | goto retry; | |
38651674 DA |
1930 | } |
1931 | return true; | |
1932 | } | |
1933 | ||
8be48d92 DA |
1934 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1935 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1936 | struct drm_display_mode **modes, |
1937 | int n, int width, int height) | |
1938 | { | |
1939 | int c, o; | |
1940 | struct drm_connector *connector; | |
be26a66d | 1941 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 1942 | struct drm_encoder *encoder; |
38651674 | 1943 | int my_score, best_score, score; |
8be48d92 | 1944 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1945 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1946 | |
0b4c0f3f | 1947 | if (n == fb_helper->connector_count) |
38651674 | 1948 | return 0; |
0b4c0f3f DA |
1949 | |
1950 | fb_helper_conn = fb_helper->connector_info[n]; | |
1951 | connector = fb_helper_conn->connector; | |
38651674 DA |
1952 | |
1953 | best_crtcs[n] = NULL; | |
8be48d92 | 1954 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1955 | if (modes[n] == NULL) |
1956 | return best_score; | |
1957 | ||
255f0e7c | 1958 | crtcs = kzalloc(fb_helper->connector_count * |
8be48d92 | 1959 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
1960 | if (!crtcs) |
1961 | return best_score; | |
1962 | ||
1963 | my_score = 1; | |
1964 | if (connector->status == connector_status_connected) | |
1965 | my_score++; | |
0b4c0f3f | 1966 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1967 | my_score++; |
0b4c0f3f | 1968 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1969 | my_score++; |
1970 | ||
1971 | connector_funcs = connector->helper_private; | |
c61b93fe BB |
1972 | |
1973 | /* | |
1974 | * If the DRM device implements atomic hooks and ->best_encoder() is | |
1975 | * NULL we fallback to the default drm_atomic_helper_best_encoder() | |
1976 | * helper. | |
1977 | */ | |
1978 | if (fb_helper->dev->mode_config.funcs->atomic_commit && | |
1979 | !connector_funcs->best_encoder) | |
1980 | encoder = drm_atomic_helper_best_encoder(connector); | |
1981 | else | |
1982 | encoder = connector_funcs->best_encoder(connector); | |
1983 | ||
38651674 DA |
1984 | if (!encoder) |
1985 | goto out; | |
1986 | ||
38651674 DA |
1987 | /* select a crtc for this connector and then attempt to configure |
1988 | remaining connectors */ | |
8be48d92 DA |
1989 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1990 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1991 | |
96081cdf | 1992 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1993 | continue; |
38651674 DA |
1994 | |
1995 | for (o = 0; o < n; o++) | |
1996 | if (best_crtcs[o] == crtc) | |
1997 | break; | |
1998 | ||
1999 | if (o < n) { | |
1d42bbc8 DA |
2000 | /* ignore cloning unless only a single crtc */ |
2001 | if (fb_helper->crtc_count > 1) | |
2002 | continue; | |
2003 | ||
2004 | if (!drm_mode_equal(modes[o], modes[n])) | |
2005 | continue; | |
38651674 DA |
2006 | } |
2007 | ||
2008 | crtcs[n] = crtc; | |
8be48d92 DA |
2009 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
2010 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
2011 | width, height); |
2012 | if (score > best_score) { | |
38651674 DA |
2013 | best_score = score; |
2014 | memcpy(best_crtcs, crtcs, | |
255f0e7c | 2015 | fb_helper->connector_count * |
8be48d92 | 2016 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 2017 | } |
38651674 DA |
2018 | } |
2019 | out: | |
2020 | kfree(crtcs); | |
2021 | return best_score; | |
2022 | } | |
2023 | ||
8be48d92 | 2024 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 2025 | { |
8be48d92 DA |
2026 | struct drm_device *dev = fb_helper->dev; |
2027 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2028 | struct drm_display_mode **modes; |
b0ee9e7f | 2029 | struct drm_fb_offset *offsets; |
8be48d92 | 2030 | struct drm_mode_set *modeset; |
38651674 DA |
2031 | bool *enabled; |
2032 | int width, height; | |
11e17a08 | 2033 | int i; |
38651674 DA |
2034 | |
2035 | DRM_DEBUG_KMS("\n"); | |
2036 | ||
2037 | width = dev->mode_config.max_width; | |
2038 | height = dev->mode_config.max_height; | |
2039 | ||
383b2e57 | 2040 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 2041 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 2042 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 2043 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 2044 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 2045 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 2046 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 2047 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 2048 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2049 | DRM_ERROR("Memory allocation failed\n"); |
2050 | goto out; | |
2051 | } | |
2052 | ||
38651674 | 2053 | |
0b4c0f3f | 2054 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2055 | |
11e17a08 JB |
2056 | if (!(fb_helper->funcs->initial_config && |
2057 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2058 | offsets, |
11e17a08 | 2059 | enabled, width, height))) { |
383b2e57 ML |
2060 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2061 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2062 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2063 | |
b0ee9e7f DA |
2064 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2065 | enabled, width, height) && | |
2066 | !drm_target_preferred(fb_helper, modes, offsets, | |
2067 | enabled, width, height)) | |
1d42bbc8 | 2068 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2069 | |
11e17a08 JB |
2070 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2071 | width, height); | |
38651674 | 2072 | |
11e17a08 JB |
2073 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2074 | } | |
8be48d92 DA |
2075 | |
2076 | /* need to set the modesets up here for use later */ | |
2077 | /* fill out the connector<->crtc mappings into the modesets */ | |
2078 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2079 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2080 | modeset->num_connectors = 0; | |
7e53f3a4 | 2081 | modeset->fb = NULL; |
8be48d92 | 2082 | } |
38651674 | 2083 | |
0b4c0f3f | 2084 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 2085 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2086 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2087 | struct drm_fb_offset *offset = &offsets[i]; |
8be48d92 | 2088 | modeset = &fb_crtc->mode_set; |
38651674 | 2089 | |
8be48d92 | 2090 | if (mode && fb_crtc) { |
b0ee9e7f DA |
2091 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2092 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
8be48d92 | 2093 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2094 | fb_crtc->x = offset->x; |
2095 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2096 | if (modeset->mode) |
2097 | drm_mode_destroy(dev, modeset->mode); | |
2098 | modeset->mode = drm_mode_duplicate(dev, | |
2099 | fb_crtc->desired_mode); | |
0b4c0f3f | 2100 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 2101 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2102 | modeset->x = offset->x; |
2103 | modeset->y = offset->y; | |
38651674 | 2104 | } |
38651674 DA |
2105 | } |
2106 | ||
7e53f3a4 DV |
2107 | /* Clear out any old modes if there are no more connected outputs. */ |
2108 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2109 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2110 | if (modeset->num_connectors == 0) { | |
2111 | BUG_ON(modeset->fb); | |
7e53f3a4 DV |
2112 | if (modeset->mode) |
2113 | drm_mode_destroy(dev, modeset->mode); | |
2114 | modeset->mode = NULL; | |
2115 | } | |
2116 | } | |
8c5eaca0 | 2117 | out: |
38651674 DA |
2118 | kfree(crtcs); |
2119 | kfree(modes); | |
b0ee9e7f | 2120 | kfree(offsets); |
38651674 DA |
2121 | kfree(enabled); |
2122 | } | |
2123 | ||
2124 | /** | |
207fd329 | 2125 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2126 | * @fb_helper: fb_helper device struct |
2127 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2128 | * |
d0ddc033 | 2129 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2130 | * At the moment, this is a cloned configuration across all heads with |
2131 | * a new framebuffer object as the backing store. | |
2132 | * | |
207fd329 DV |
2133 | * Note that this also registers the fbdev and so allows userspace to call into |
2134 | * the driver through the fbdev interfaces. | |
2135 | * | |
2136 | * This function will call down into the ->fb_probe callback to let | |
2137 | * the driver allocate and initialize the fbdev info structure and the drm | |
2138 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
2139 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
2140 | * values for the fbdev info structure. | |
2141 | * | |
40f8cf4b DV |
2142 | * HANG DEBUGGING: |
2143 | * | |
2144 | * When you have fbcon support built-in or already loaded, this function will do | |
2145 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2146 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2147 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2148 | * to consoles, not even serial console. This means when your driver crashes, | |
2149 | * you will see absolutely nothing else but a system stuck in this function, | |
2150 | * with no further output. Any kind of printk() you place within your own driver | |
2151 | * or in the drm core modeset code will also never show up. | |
2152 | * | |
2153 | * Standard debug practice is to run the fbcon setup without taking the | |
2154 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2155 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2156 | * cmdline option. | |
2157 | * | |
2158 | * The other option is to just disable fbdev emulation since very likely the | |
af509d38 L |
2159 | * first modeset from userspace will crash in the same way, and is even easier |
2160 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
40f8cf4b DV |
2161 | * kernel cmdline option. |
2162 | * | |
38651674 DA |
2163 | * RETURNS: |
2164 | * Zero if everything went ok, nonzero otherwise. | |
2165 | */ | |
01934c2a | 2166 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2167 | { |
8be48d92 | 2168 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
2169 | int count = 0; |
2170 | ||
f64c5573 DV |
2171 | if (!drm_fbdev_emulation) |
2172 | return 0; | |
2173 | ||
53f1904b | 2174 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
2175 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
2176 | dev->mode_config.max_width, | |
2177 | dev->mode_config.max_height); | |
53f1904b | 2178 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
2179 | /* |
2180 | * we shouldn't end up with no modes here. | |
2181 | */ | |
96081cdf | 2182 | if (count == 0) |
d56b1b9d | 2183 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 2184 | |
8be48d92 | 2185 | drm_setup_crtcs(fb_helper); |
38651674 | 2186 | |
4abe3520 | 2187 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 2188 | } |
8be48d92 | 2189 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2190 | |
7394371d CW |
2191 | /** |
2192 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2193 | * probing all the outputs attached to the fb |
7394371d CW |
2194 | * @fb_helper: the drm_fb_helper |
2195 | * | |
7394371d CW |
2196 | * Scan the connectors attached to the fb_helper and try to put together a |
2197 | * setup after *notification of a change in output configuration. | |
2198 | * | |
207fd329 DV |
2199 | * Called at runtime, takes the mode config locks to be able to check/change the |
2200 | * modeset configuration. Must be run from process context (which usually means | |
2201 | * either the output polling work or a work item launched from the driver's | |
2202 | * hotplug interrupt). | |
2203 | * | |
50c3dc97 | 2204 | * Note that drivers may call this even before calling |
af509d38 | 2205 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
50c3dc97 DV |
2206 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
2207 | * not miss any hotplug events. | |
207fd329 | 2208 | * |
7394371d CW |
2209 | * RETURNS: |
2210 | * 0 on success and a non-zero error code otherwise. | |
2211 | */ | |
2212 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2213 | { |
7394371d | 2214 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 2215 | u32 max_width, max_height; |
5c4426a7 | 2216 | |
f64c5573 DV |
2217 | if (!drm_fbdev_emulation) |
2218 | return 0; | |
2219 | ||
89ced125 | 2220 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 2221 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2222 | fb_helper->delayed_hotplug = true; |
89ced125 | 2223 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 2224 | return 0; |
4abe3520 | 2225 | } |
eb1f8e4f | 2226 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2227 | |
eb1f8e4f DA |
2228 | max_width = fb_helper->fb->width; |
2229 | max_height = fb_helper->fb->height; | |
5c4426a7 | 2230 | |
51bbd276 | 2231 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
2232 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
2233 | ||
2234 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 2235 | drm_setup_crtcs(fb_helper); |
84849903 | 2236 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
2237 | drm_fb_helper_set_par(fb_helper->fbdev); |
2238 | ||
2239 | return 0; | |
5c4426a7 | 2240 | } |
eb1f8e4f | 2241 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2242 | |
6a108a14 | 2243 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2244 | * but the module doesn't depend on any fb console symbols. At least |
2245 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2246 | */ | |
70412cfa | 2247 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2248 | { |
70412cfa | 2249 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2250 | const char *name = "fbcon"; |
2251 | struct module *fbcon; | |
2252 | ||
2253 | mutex_lock(&module_mutex); | |
2254 | fbcon = find_module(name); | |
2255 | mutex_unlock(&module_mutex); | |
2256 | ||
2257 | if (!fbcon) | |
2258 | request_module_nowait(name); | |
70412cfa | 2259 | #endif |
3ce05168 DF |
2260 | return 0; |
2261 | } | |
70412cfa | 2262 | EXPORT_SYMBOL(drm_fb_helper_modinit); |